Humans are now the single most powerful force reshaping the planet's surface — clearing land, damming rivers, building cities, drawing on resources. Scientists describe a proposed new interval, the Anthropocene, in which human activity dominates natural systems.
Diversity = the variety of activities (a subsistence plot → a megacity → an automated port). Extent = how far they reach — nearly all ice-free land is now touched, directly or through pollution & a changing climate.
| Country / measure | Footprint (gha per person) |
|---|---|
| Qatar | ~14 |
| United States | ~8 |
| Australia | ~7 |
| China | ~3.8 |
| World average | ~2.7 |
| India | ~1.2 |
| Earth’s biocapacity | ~1.6 |
Activity is not spread evenly — it forms distinct spatial patterns. People & economies concentrate where conditions favour them: fertile land, fresh water, coastlines, trade routes, minerals, and existing cities that attract still more.
Note what overshoot means and one way to shrink a footprint.
"Human activity has never been more diverse or more extensive — and that is exactly the problem." How far do you agree?
"Explain the diversity and extent of human activity on Earth, and evaluate its consequences for natural systems." (~600 words)